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You need to complete the following task:

Construct a timeline of significant events in a particular field.

field: American history

Answer:
assistant
| Date | Event |
|------|-------|
| 1492 | Christopher Columbus discovers America | 
| 1776 | Declaration of Independence is signed | 
| 1789 | US Constitution is ratified | 
| 1861-65 | US Civil War | 
| 1941 | Attack on Pearl Harbor | 
| 1945 | End of World War II | 
| 1954 | Brown v. Board of Education of Topeka | 
| 1963 | Martin Luther King Junior's "I Have a Dream" speech | 
| 1969 | Moon Landing | 
| 2001 | 9/11 attacks | 
| 2008 | Election of Barack Obama |